You can construct all pcr files you need by including corresponding crystal data in a previous pcr file. It is very easy if you follow the usual instructions of this software.
Download the cif file of your structure from ICSD (Inorganic Crystal Structure Database) and substitute these crystallographic information to a pcr file of Fullprof given as examples viz. LaMnO3. You have understand a bit of crystallography of course. You must know how to get the Wykoff positions in the International Tables of Crystallography and calculate the site occupancies.
You should also perhaps apply for Fullprof school that we arrange here in Grenoble. Then you will know how to use Fullprof for the refinement of the crystal and the magnetic structure.
Hi, .pcr file format depends in some extend on your Diffractometer configuration (I suppose you are dealing with classical laboratory powder XRD technique). Without providing some information as which tube you are using, monochromator, format of data, etc... difficult to send a "ready to use" file. If you are refining in Rietveld mode, of course it must contain all the cif file information, as mentionned by Tapan but be carefull to know which TiO2 or WO3 polymorph you need...
Hope it can help
If you do not have magnetic structure (which you have not in WO3 and TiO2) to refine then I shall advise you use GSAS program. GSAS is very user friendly.
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